Two piece cancellous construct for cartilage repair

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/30 (2006.01) A61F 2/28 (2006.01) A61L 27/36 (2006.01)

Patent

CA 2675170

The invention is directed toward a cartilage repair assembly comprising a shaped allograft two piece construct (20) with a demineralized cancellous cap (30) and a mineralized cylindrical base member (22) defining a blind bore (23) wrth a through going transverse bore (28) intersecting the blind bore (23). The demineralized cancellous cap (30) has a cylindrical top portion (32) and a smaller diameter cylindrical stem (36) extending away from the top portion (32) which fits into the blind bore (23) of the mineralized base member (22). The cap stem (36) defines a transverse through going bore (37) which is aligned with the through going bore (28) of the base member (22) to receive a cylindrical cortical pin (40) holding the cap (30) within the base member (22). The shaped structure (20) is dimensioned to fit in a drilled bore in a cartilage delect area so that the assembly engages the side wall of the drilled bore in an interference fit.

L'invention concerne un ensemble réparation de cartilage comprenant une construction profilée à deux pièces pour allogreffe (20). Ladite construction est pourvue d'un capuchon spongieux déminéralisé (30) et d'un élément de base cylindrique minéralisé (22) définissant un trou aveugle (23), avec un trou transversal traversant (28) entrecoupant ledit trou aveugle (23). Le capuchon spongieux déminéralisé (30) présente une portion supérieure cylindrique (32) et une tige cylindrique de diamètre inférieur (36) s'étendant depuis la partie supérieure (32), qui s'adapte dans le trou aveugle (23) de l'élément de base minéralisé (22). La tige du capuchon (36) définit un trou transversal traversant (37) qui est aligné avec le trou traversant (28) de l'élément de base (22), de manière à accueillir un tenon cortical cylindrique (40) maintenant le capuchon (30) dans l'élément de base (22). La structure profilée (20) est dimensionnée de manière à s'adapter dans un trou percé dans une zone de défaut de cartilage, de telle sorte que l'ensemble vient en prise avec la paroi latérale du trou percé, dans un ajustement avec serrage.

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